CAMSHAFTS
5-29
4. Measure:
• Valve lifter case inside diameter “a”
Out of specification
→
Replace.
5. Calculate:
• Valve lifter-to-valve lifter case clearance
NOTE:
Calculate the clearance by subtracting the valve
lifter outside diameter from the valve lifter case
inside diameter.
Above 0.072 mm (0.0028 in)
→
Replace the
defective part(s).
EAS23930
CHECKING THE PUSH ROD COVER
1. Check:
• Push rod cover
Cranks/damage
→
Replace.
• Seal
• O-ring
Damage/wear
→
Replace the seal and O-
ring as a set.
EAS23980
CHECKING THE DECOMPRESSION SYSTEM
1. Check:
• Decompression system
NOTE:
• Check that the decompression pin “1” projects
from the camshaft.
• Check that the decompression cam “2” and de-
compression pin “1” moves smoothly.
2. Check:
• Decompression cam
• Decompression pin
Damage/wear
→
Replace.
ET1D71031
CHECKING THE DECOMPRESSION CAM
SPRING
The following procedure applies to all of the de-
compression cam springs.
1. Measure:
• Decompression cam spring free length “a”
Out of specification
→
Replace the decom-
pression cam spring.
Valve lifter outside diameter (in-
take)
22.962–22.974 mm (0.9040–
0.9045 in)
Valve lifter outside diameter (ex-
haust)
22.962–22.974 mm (0.9040–
0.9045 in)
Valve lifter hole inside diameter
(intake)
23.000–23.021 mm (0.9055–
0.9063 in)
Valve lifter hole inside diameter
(exhaust)
23.000–23.021 mm (0.9055–
0.9063 in)
a
Valve-lifter-to-valve-lifter-hole
clearance
0.026–0.059 mm (0.0010–0.0023
in)
Decompression cam spring
Free length
20.0 mm (0.79 in)
Limit
19.0 mm (0.75 in)
2
1
Summary of Contents for XV19CTMX(C)
Page 6: ......
Page 8: ......
Page 46: ...ELECTRICAL SPECIFICATIONS 2 19 Spare fuse 3 0 A ...
Page 63: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 36 ...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 41 D D B B D D C C A A B C C B 3 2 1 3 4 6 7 6 7 5 ...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 43 A A A A 1 3 2 4 ...
Page 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 45 A 1 2 3 4 ...
Page 74: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 47 A A A 1 5 5 1 3 2 4 B B B B ...
Page 76: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 49 1 2 ...
Page 77: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 50 1 Transfer gear oil pump 2 Middle driven shaft ...
Page 110: ...CABLE ROUTING for XV19CS C XV19C C 2 83 ...
Page 113: ......
Page 150: ...ELECTRICAL SYSTEM 3 37 ...
Page 179: ...FRONT WHEEL 4 26 ...
Page 218: ...HANDLEBAR 4 65 Throttle cable free play 4 0 6 0 mm 0 16 0 24 in ...
Page 330: ...GENERATOR AND STARTER CLUTCH 5 81 ...
Page 368: ...TRANSMISSION 5 119 ...
Page 391: ......
Page 397: ...IGNITION SYSTEM 7 6 ...
Page 405: ...CHARGING SYSTEM 7 14 1 AC magneto 2 Rectifier regulator 4 Main fuse 6 Battery ...
Page 407: ...CHARGING SYSTEM 7 16 ...
Page 460: ...ELECTRICAL COMPONENTS 7 69 16 18 2 11 13 9 8 10 12 14 15 17 1 3 4 5 6 7 ...
Page 490: ......
Page 491: ......
Page 492: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...